One Powerchair, Built for Both Indoor and Outdoor Life
The Quantum Edge 4 takes the familiar mid-wheel-drive Edge platform and gives it a significant step forward in comfort, control, visibility and outdoor capability. Rather than being designed primarily around either indoor manoeuvrability or outdoor performance, the Edge 4 bridges both environments. That matters because real life rarely happens in just one setting. A powerchair may need to navigate kitchens, bedrooms and tight doorways, then move across thresholds, footpaths, shopping centres, grass, gravel and park paths.
Building on the success of the Edge 3 and Edge 3 Stretto, the Edge 4 combines the indoor advantages of mid-wheel drive with significant upgrades for community and outdoor mobility.
Key performance upgrades include:
- Larger 7-inch front and rear castors
- Powerful Linak 4-pole motors
- Improved Smooth Ride Suspension (SRS) and damping
- Enhanced obstacle negotiation
- Increased ground clearance
- 70Ah batteries providing increased driving range
- Improved visibility for community use
Together, these changes create a more rounded powerchair for users whose mobility regularly spans home and community environments.
Compact and Manoeuvrable Indoors
Despite its increased outdoor capability, the Edge 4 remains a compact mid-wheel-drive powerchair. Its main drive wheels sit beneath the user, providing predictable manoeuvrability and a tight turning circle. The power base is approximately 24 inches wide with a 22.8-inch turning radius, making it practical around doorways, kitchens, corridors, bathrooms and other areas where space is limited.
It is particularly compact when compared with other powered wheelchairs using 4-pole motors and 70Ah batteries, which can often sit in a class above the Edge 4 in overall size. The six-wheel arrangement and fully independent SRS suspension also help maintain wheel contact, traction and stability when turning or negotiating changes in surface level.
The result is not an outdoor-oriented chair that simply happens to fit inside a house. The Edge 4 retains the fundamental indoor benefits that make mid-wheel drive so useful.
More Capable When the Surface Gets Rough
Daily mobility isn't just about moving from one room to another. It means travelling across footpaths, negotiating thresholds, accessing shops, attending appointments and participating in community life. This is where many of the Edge 4's upgrades become particularly noticeable.
The Edge 4's upgraded Smooth Ride Suspension (SRS) and damping help reduce the vibration and impact transmitted through the chair from footpath joints, driveway transitions, thresholds, cracked pavement and uneven ground.
Its 7-inch front and rear castors, compared with 6-inch castors on the Edge 3, also make it easier to roll across surface irregularities and obstacles with less abrupt impact. Combined with increased ground clearance, these upgrades provide a smoother and more controlled transition between indoor and outdoor environments.
Linak 4-Pole Motors: More Than Just Extra Speed
The Edge 4 comes standard with Linak 4-pole motors, compared with the standard 2-pole motors on the Edge 3. Coupled with an upgraded and simplified gearbox, the 4-pole motors provide increased torque and greater control at low speeds – particularly useful when travelling across variable terrain, climbing slopes or dealing with the increased rolling resistance of more aggressive tyres.
The Edge 4 has a maximum speed of approximately 11.2 km/h, reducing to approximately 7.2 km/h when driving with iLevel elevated. The benefit, however, isn't simply top speed. The motor package contributes to a stronger and more controlled drive platform for both indoor manoeuvring and outdoor performance.
70Ah Batteries for Longer Days
The Edge 4 comes standard with 70Ah batteries, providing approximately 40% more range than the Edge 3. Published driving range is up to approximately 29 km, although actual range will vary depending on user weight, terrain, temperature, battery condition, tyre type and pressure, driving style and chair configuration. For users spending a full day away from home, that additional capacity can provide greater freedom without having to plan the day as closely around the next recharge.
Take It Further with Quantum's Community Tyre Package
For users regularly travelling over grass, gravel and rougher outdoor surfaces, the Edge 4 can also be configured with 14-inch Community flat-free knobby tyres.
Their more aggressive tread provides additional traction on surfaces including:
- Grass and damp grass
- Gravel and compacted paths
- Dirt tracks
- Uneven lawns and park surfaces
- Loose or broken outdoor surfaces
Importantly, this doesn't turn the Edge 4 into a dedicated all-terrain chair or remove its fundamental indoor advantages. Instead, the Community/knobby configuration provides an interesting middle ground with increased traction and outdoor confidence while retaining the compact mid-wheel architecture needed for everyday indoor mobility.
Advanced Seating and Positioning
For many power wheelchair users, seating is just as important as mobility. The Edge 4 is compatible with Quantum's advanced TRU-Balance seating systems, supporting posture, pressure management, function and independence through options including:
- Power Tilt
- Power Recline
- Anterior Tilt
- Power Articulating Foot Platform
- Memory Seating Functions
- 12 Inch iLevel Seat Elevation
This allows therapists and assessors to configure the chair around the individual's clinical, functional and positioning requirements.
iLevel: Elevating More Than Just the Seat
Optional 12-inch iLevel seat elevation allows users to raise their seating position while continuing to drive at up to approximately 7.2 km/h.
This can help users engage at eye level, access shelving and work surfaces, reduce reaching and overextension, and participate more naturally with family, friends and colleagues.
For many users, that can translate directly into greater independence in everyday activities.
Smart Technology for Everyday Living
The Edge 4 features Quantum's Q-Logic 3 control system with Bluetooth connectivity, supporting compatible devices and alternative drive controls.
Technology options include:
- Bluetooth connectivity
- Alternative drive controls
- USB charging capabilities
- Optional Quantum Backup Camera
These features help users stay connected, independent and in control throughout the day.
Improved Visibility
Integrated LED lighting within the castor arms and fenders improves visibility during low-light community travel while also giving the Edge 4 a distinctive modern appearance.
Whether moving through carparks, community spaces or travelling in early morning and evening conditions, improved front and rear visibility can contribute to greater confidence and awareness.
Edge 4 Versus Edge 3: Where the Difference Is Felt
The Edge 3 remains a highly capable mid-wheel-drive powerchair and, with its tighter turning radius, is particularly well suited to environments where indoor footprint and manoeuvrability are the overriding considerations, and is on list.
The Edge 4 is an evolution of that platform, with its major changes focused on users whose mobility extends further into outdoor and community environments.
Compared with the Edge 3, it combines larger castors, increased ground clearance, upgraded SRS and damping, 4-pole motors, 70Ah batteries, greater range, improved visibility and optional Community/knobby tyres.
Rather than simply making the Edge 3 faster, these changes create a more rounded platform with greater comfort, traction and obstacle capability while retaining the advantages of mid-wheel drive.
Who Might Benefit from the Edge 4?
The Edge 4 may be particularly suitable for individuals who:
- Require advanced seating and positioning
- Spend significant time in their wheelchair each day
- Need reliable performance across varied environments
- Regularly transition between indoor and outdoor environments
- Want access to seat elevation technology
- Require alternative drive controls
- Need greater range for longer days away from home
- Want improved traction and obstacle negotiation for community mobility
- Value independence, comfort and community participation
As with any complex technology, a comprehensive assessment is essential to determine whether the Edge 4 is the right fit.
The Bottom Line
The biggest strength of the Quantum Edge 4 isn't any one specification. It is how the specifications work together.
With standard tyres, it remains a practical indoor and community powerchair. Add the Community knobby configuration and it becomes substantially more confident on grass, gravel and rougher surfaces, without sacrificing the compact mid-wheel architecture needed back inside the home.
Combined with 70Ah batteries, 4-pole motors, larger castors, upgraded SRS, advanced seating and improved visibility, this makes the Edge 4 a compelling option for users looking for a genuine indoor/outdoor Group 3 powerchair, rather than one optimised for one environment at the expense of the other.
Available Through Allied Medical
At Allied Medical, we work closely with therapists, assessors, funders and wheelchair users across New Zealand to provide complex solutions that support independence and quality of life.
The Quantum Edge 4 represents the next evolution of powered mobility, combining advanced technology with the performance needed for everyday living.
If you'd like to learn more about the Quantum Edge 4 or discuss whether it may be suitable for you or your client, our Technical Product Specialists are here to help.